The circuit starts with a NE612 mixer IC (IC1), which also contains an oscillator. The oscilla-tor is a Colpitts type and is tuned here using a dual-varicap diode (D1). The Mixer is fol-lowed by a crystal filter which has a centre frequency of 45 MHz and a bandwidth of 15 kHz.

The transmitter consists of a TX mixer (NE612) and a bandpass filter on 70 MHz. In the mixer the VCO signal is mixed with the SSB from the exiter in mode USB/LSB, and with a simple crystal oscillator at 10.7 MHz for FM and CW.

The NE/SA612A is a low-power VHF monolithic double-balanced mixer with on-board oscillator and voltage regulator. It is intended for low cost, low power communication systems with signal frequencies to 500MHz and local oscillator frequencies as high as 200MHz.

2020年2月23日 · The well-known mixer NE612 (NXP) will be compared to an AN612 (Matsushita/Panasonic) mixer that has been unsoldered from an old CB-SSB-radio. Comparison will include output voltage level and spectroscopic analysis of a 9MHz SSB signal.

The signal of the VCO in the 4046 is buffered by feeding it into the internal phase detector. At pin 2 it exits the 4046 and is fed into a resistive divider to give a signal of about 260 mV amplitude, suitable for input into the NE612 mixer.

VFO is mixed with 4.0 Mhz. to get the desired 7.0 Mhz signal. The term "heterodyne" refers to the mixing function, where two different frequencies are combined in a non-linear way to generate an output waveform of a different frequency.

2024年1月6日 · NE602混频器在许多业余电路中广为人知，今年将与其兄弟 NE612、SA602、SA612 一起停产。 因此，是时候寻找替代方案并了解此类芯片的工作原理了。 混合：加法还是乘法？ 根据上下文，“混合”两个模拟信号（如电压）可能意味着将它们相加或相乘。 例如，在音频信号的情况下，混合意味着相加；想象一下录音室中的混音控制台，或者计算机中的“混音器”设置。 添加电压后，不会出现新的频率。 然而，在无线电技术中，混频器是一种产生和频和差频的 …

NE/SA 602 und NE 612 von Philips sind in tegrierte doppelt-symmetrische Low-Power-Mischer mit Eingangsverstärker, Oszillator inklusive Puffer und tempera-turkompensiertem Spannungsregler.

The NE612 is a low-power VHF mono lithic double-balanced mixer with on board oscillator and voltage regulator. It is intended for low cost, low power communication systems with signal fre quencies to 500MHz and local oscillator frequencies as high as 200M Hz.

The NE612, also known as the NE612A, is a versatile analog multiplier and mixer IC that is widely used in radio frequency (RF) and intermediate frequency (IF) applications. At its core, the NE612 functions as a balanced modulator and a mixer, allowing for the combination of multiple input signals and the generation of an output signal with ...